def sha(self):
"""The SHA1 object that is the name of this object."""
if self._needs_serialization or self._sha is None:
self._sha = make_sha()
self._sha.update(self._header())
self._sha.update(self.as_raw_string())
return self._sha
def calculate_checksum(self):
"""Calculate the checksum for this pack.
:return: 20-byte binary SHA1 digest
"""
map, map_offset = simple_mmap(self._file, 0, self._size - 20)
try:
return make_sha(map[map_offset:self._size-20]).digest()
finally:
map.close()
def iter_sha1(iter):
"""Return the hexdigest of the SHA1 over a set of names.
:param iter: Iterator over string objects
:return: 40-byte hex sha1 digest
"""
sha1 = make_sha()
for name in iter:
sha1.update(name)
return sha1.hexdigest()
def write_object(self, obj_type, obj_contents):
raw_data = "%s %d\0%s" % (obj_type, len(obj_contents), obj_contents)
git_sha = make_sha(raw_data)
git_hex_sha = git_sha.hexdigest()
if not git_hex_sha in self.object_store:
object_dir = os.path.join(self.path, OBJECTDIR, git_hex_sha[0:2])
if not os.path.exists(object_dir):
os.mkdir(object_dir)
object_path = os.path.join(object_dir, git_hex_sha[2:])
data = zlib.compress(raw_data)
open(object_path, 'w').write(data) # write the object
return git_hex_sha
def __init__(self, f):
self.f = f
self.sha1 = make_sha("")
def calculate_checksum(self):
"""Calculate the SHA1 checksum over this pack index.
:return: This is a 20-byte binary digest
"""
return make_sha(self._contents[:-20]).digest()
